326 P open case

Artificial Resistive Load (326P)

Cost-effective, Portable Light weight Artificial Load Box

The TESCO 326P Artificial Resistive Load (Catalog No. 326P) is a modernized, field-ready load box designed to meet today’s metering and utility testing requirements. Built upon decades of  TESCO engineering expertise, the 326P offers a portable, and rugged solution for technicians who need reliable resistive loads for verification, calibration, and field diagnostics.

Weighing  only 16.8 lbs., the 326P is one of the lightest artificial resistive loads available, making it ideal for field personnel who require dependable performance without the burden of heavy traditional load  boxes. The unit supports multiple voltage inputs and a wide range of selectable full-load and light-load currents, enabling accurate testing across many standard field applications. The 326P  continues TESCO’s legacy of producing durable, high-quality utility testing instruments designed to withstand real-world operating conditions.

SKU: 326P Category:
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Description

Key Features:

  • Lightweight & Field Portable: At only 16.8 lbs., the 326P is easier to handle, transport, and deploy than traditional load boxes—ideal for technicians working across multiple sites.
  • Wide Voltage Compatibility: Supports 120V to 480V, covering the most common voltage environments encountered in field metering applications.
  • Selectable Load Taps: Technicians can choose from a range of full-load and light-load current settings to match a variety of testing scenarios.
  • Versatile Load Selection: Offers five full-load settings and five light-load settings, allowing load application during field testing or troubleshooting.
  • Modernized Build for Field Conditions: Updated to 21st-century standards with improved portability and durability.
  • Optional Accessories for Expanded Capability: Compatible with TESCO’s ecosystem of field tools including cable sets, click switches, and test plugs.

Applications and Use Cases:

  • Field verification of metering installations
  • Load application for meter testing and calibration
  • Troubleshooting and diagnostic evaluations
  • Technician training and proficiency testing
  • General utility field load application scenarios

Specifications

Category Details
Mechanical & Environmental
  • Dimensions: 11” × 7” × 10” (W × D × H)
  • Weight: 16.8 lbs
Electrical & Power
  • Input Voltages: 120V / 240V / 277V / 480V
Load Output Ranges
  • Full Load Settings: 2.5A, 5A, 15A, 30A, 50A
  • Light Load Settings: 0.25A, 0.5A, 1.5A, 3A, 5A
Safety & Compliance
  • Standard TESCO rugged construction
  • Designed for field use
Included
  • Potential Cable Set: J-35-50C-BPLG (6 FT)
  • Current Cable Set: 800-0519 (6 FT)
Optional Accessories
  • Make-to-Order Optional Cable Sets

Ordering Information:

  • Catalog Number: 326P
  • Included: 326P Artificial Resistive Load unit
  • Warranty: 1 Year (Contact your TESCO Sales Representative to inquire about our Diamond Level Support for extended warranty coverage).

Product Documents

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Disclaimer:

TESCO Metering reserves the right to modify product designs, specifications, features, and documentation at any time as part of our continuous improvement process. All information is provided “as is” and may change without prior notice. While TESCO® strives for accuracy, completeness, and technical reliability, customers should verify the latest product details before making purchasing or engineering decisions. For confirmation of current specifications or application suitability, please contact TESCO® directly.